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Renesas R1LP0408DSP-5SI#S1
- Part No.:
- R1LP0408DSP-5SI#S1
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.450", 11.40mm Width)
- Datasheet:
-
R1LP0408DSP-5SI#S1.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,178
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Product details
Overview
R1LP0408DSP-5SI#S1 from Renesas Electronics is a 4Mb advanced low-power static RAM (512-kword × 8-bit), designed as a non-volatile memory buffer in battery-backed systems. It operates from a single 5V supply (4.5–5.5V), delivers 55ns max access time, draws only 0.8µA typical standby current at +25°C, and supports TTL-compatible I/O for direct microcontroller interfacing in embedded data logging applications.
For engineers reviewing the R1LP0408DSP-5SI#S1 datasheet, R1LP0408DSP-5SI#S1 pinout, R1LP0408DSP-5SI#S1 application, or R1LP0408DSP-5SI#S1 equivalent, key selection criteria include its 32-pin SOP package, battery-retention capability down to 2.0V Vcc, three-state bidirectional I/O, and guaranteed 55ns read/write cycle timing across -40°C to +85°C.
Technical Context
The R1LP0408DSP-5SI#S1 implements a 2,048 × 2,048 memory matrix with full row/column decoding and integrated timing pulse generation. Its control logic accepts asynchronous CS#, WE#, and OE# inputs to manage read, write, and high-impedance output states without external clocking.
It features dual standby modes: ISB (0.5mA max) when CS# = VIH and all controls within Vss–Vcc, and ultra-low ISB1 (10µA max at +85°C) under bias with CS# ≥ Vcc−0.2V - enabling reliable data retention during brownout or backup power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512-kword × 8-bit); supports byte-wide data transfers with no address multiplexing |
| Access time | 55 ns max; ensures compatibility with legacy 8-bit microcontrollers running at ≤18 MHz bus clocks |
| Supply voltage | 4.5 V to 5.5 V; operates directly from standard 5V rails without regulation |
| Standby current | 0.8 µA typ. at +25°C (ISB1); enables multi-year battery life in SRAM-backed real-time clocks |
| Data retention Vcc | 2.0 V min; retains data during deep brownout or coin-cell backup operation |
| I/O interface | Three-state bidirectional I/O0–I/O7; eliminates need for external bus transceivers in shared-data-bus systems |
| Operating temperature | -40°C to +85°C; qualified for industrial and automotive under-hood auxiliary modules |
Pinout & Package
Package: 32-pin plastic SOP (525-mil width), RoHS-compliant, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply input | Primary 5V supply rail; decoupling capacitor required within 10 mm for stable 55ns timing |
| Vss | Ground reference | Signal and power ground return; must be connected to system GND plane with low-inductance path |
| A0–A18 | Address inputs | 19-bit address bus supporting full 512-kword addressing; no address latching required |
| I/O0–I/O7 | Bidirectional data bus | Three-state CMOS I/O; driven high-Z when CS# = VIH or OE# = VIH, eliminating bus contention |
| CS# | Chip select (active low) | Enables memory access; controls internal buffers and determines standby vs active mode |
| WE# | Write enable (active low) | Initiates write cycle on falling edge; requires overlap with CS# low per tWP ≥ 40 ns |
| OE# | Output enable (active low) | Gates read data onto I/O lines; high-Z when deasserted, allowing shared bus use |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or level shifters in legacy 5V controller designs |
| Ultra-low ISB1 standby current | Reduces average power in always-on backup memory to <1 µA, extending CR2032 battery life beyond 10 years |
| Direct TTL compatibility | Accepts and drives standard TTL logic levels without external interface circuitry |
| Equal access and cycle times | Simplifies timing budgeting in synchronous bus systems - tRC = tAA = 55 ns max |
| Low Vcc data retention | Maintains stored data down to 2.0V Vcc, supporting seamless transition to backup power without data loss |
Applications
| Industrial Data Logger | Medical Patient Monitor Buffer |
|---|---|
Use Scenario: Continuous acquisition of sensor data (e.g., temperature, pressure) with periodic flash storage offload. IC Role / Device Role / Timing Role: High-reliability, low-power SRAM buffer holding up to 512 KB of raw waveform data before compression and transfer. Use Value: 0.8 µA ISB1 current enables >5-year operation on primary battery; 55ns access supports real-time sampling at 10 kSPS without DMA bottlenecks. | Use Scenario: Temporary storage of ECG/SpO₂ waveforms during power failover or firmware update. IC Role / Device Role / Timing Role: Battery-backed memory preserving critical patient data during AC loss or brownout events. Use Value: Guaranteed data retention at 2.0V Vcc ensures zero data loss during 100-ms power interruption; 32-pin SOP fits compact front-end PCB layouts. |
| Automotive Telematics Event Recorder | POS Terminal Transaction Cache |
Use Scenario: Capturing CAN bus diagnostics and GPS timestamps during crash or fault events. IC Role / Device Role / Timing Role: Non-volatile scratchpad memory capturing pre-event snapshots with deterministic 55ns read latency. Use Value: -40°C to +85°C rating meets AEC-Q100 Grade 3 requirements; ISB1 current minimizes parasitic drain on vehicle battery during sleep mode. | Use Scenario: Caching transaction receipts and card-swipe buffers prior to secure wireless upload. IC Role / Device Role / Timing Role: Secure, fast-access memory holding encrypted payment data until TLS handshake completes. Use Value: Three-state I/O prevents bus contention with secure element ICs; TTL compatibility simplifies integration with legacy 8-bit payment SoCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-55PCN | 55ns access, 4Mb (512k×8), 5V supply, but 2.5µA ISB1 (typ.) at +25°C - ~3× higher standby current | Lacks guaranteed 2.0V data retention; not rated for extended low-Vcc hold during brownout | Prefer R1LP0408DSP-5SI#S1 where battery lifetime >5 years or brownout resilience is critical |
| CY621408ELL-55ZSXIT | 55ns access, same density/package, but 1.5µA ISB1 (typ.) and no specified VDR <2.5V | Higher leakage above +70°C; no published low-Vcc retention waveform or tCDR specification | R1LP0408DSP-5SI#S1 offers superior data retention margin and industrial temperature validation |
Compared with AS6C4008-55PCN and CY621408ELL-55ZSXIT, the R1LP0408DSP-5SI#S1 delivers the lowest verified standby current at elevated temperatures and the only documented 2.0V data retention guarantee - making it the optimal choice for long-life, mission-critical backup memory where power integrity cannot be assumed.
Availability
R1LP0408DSP-5SI#S1 is available at Aetrix Electronics and suitable for industrial data loggers, medical patient monitors, and automotive telematics event recorders requiring stable component supply and long-term lifecycle support.
Supply support for R1LP0408DSP-5SI#S1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The R1LP0408D Series was developed specifically for ultra-low-power, battery-backed memory applications demanding guaranteed data retention during extended brownout conditions and industrial temperature reliability.
FAQ
What is the minimum supply voltage for data retention in R1LP0408DSP-5SI#S1?
The R1LP0408DSP-5SI#S1 guarantees data retention down to 2.0V Vcc when CS# is held ≥ Vcc−0.2V. This is validated per the Low Vcc Data Retention Characteristics table (Page 11), with ICCDR measured at 3.0V and extrapolated to 2.0V operation. The device maintains stored bits without refresh during brownout, supporting coin-cell or supercapacitor backup schemes.
Does R1LP0408DSP-5SI#S1 require external pull-up resistors on control pins?
No, the R1LP0408DSP-5SI#S1 does not require external pull-ups on CS#, WE#, or OE#. All control inputs have internal bias circuitry meeting VIH/VIL thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) across temperature. External pull-ups are unnecessary unless system-level noise immunity mandates stronger default states beyond datasheet specifications.
Is R1LP0408DSP-5SI#S1 pin-compatible with other 32-pin SOP SRAMs like the AS6C4008?
No, R1LP0408DSP-5SI#S1 is not pin-compatible with AS6C4008 despite identical 32-pin SOP packaging. Pin functions differ: AS6C4008 uses separate DQ0–DQ7 and has different address pin mapping (A0–A18 vs. AS6C4008's A0–A17 + A18 on NC). Direct replacement requires PCB redesign and signal routing verification.
What is the maximum operating current of R1LP0408DSP-5SI#S1 during active read cycles?
The R1LP0408DSP-5SI#S1 draws up to 10 mA (max) Icc during active read cycles (CS# = VIL, others at VIH/VIL, I/O = 0 mA), per DC Characteristics (Page 5). Under worst-case 100% duty-cycle operation, average current rises to 25 mA (ICC1 max), but typical usage with intermittent access yields <5 mA average draw.
Can R1LP0408DSP-5SI#S1 be used in write-cycle modes with OE# held low continuously?
Yes, R1LP0408DSP-5SI#S1 supports OE#-low-fixed write cycles (per Page 10 Waveform "Write Cycle (2)"). In this mode, tWP must satisfy tWP ≥ tDW(min) + tWHZ(max) = 25 ns + 20 ns = 45 ns to prevent data bus contention. The datasheet specifies tWP ≥ 40 ns, so OE#-low operation is valid with appropriate timing margin.
R1LP0408DSP-5SI#S1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.450", 11.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOP
R1LP0408DSP-5SI#S1 FAQ
1.How can I place an order for R1LP0408DSP-5SI#S1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSP-5SI#S1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R1LP0408DSP-5SI#S1 reliable?
The price and inventory of R1LP0408DSP-5SI#S1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSP-5SI#S1 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSP-5SI#S1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSP-5SI#S1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSP-5SI#S1?
R1LP0408DSP-5SI#S1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSP-5SI#S1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R1LP0408DSP-5SI#S1?
For technical support, including R1LP0408DSP-5SI#S1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSP-5SI#S1 requirements.
6.How does Aetrix verify that R1LP0408DSP-5SI#S1 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSP-5SI#S1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R1LP0408DSP-5SI#S1 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSP-5SI#S1?
All R1LP0408DSP-5SI#S1 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSP-5SI#S1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R1LP0408DSP-5SI#S1 part is unused and in its original packaging.
Return procedure for R1LP0408DSP-5SI#S1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSP-5SI#S1 Tags
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